I know that this is an old thread, but I finally got photos of my idea taken and online, so I thought I would post a picture here to illustrate what I am talking about.
(Note: the green plate is just for display, I wouldnt think that it should be included in a set like this. The bush is an intended accessory for the set however.)
Image changed to link by admin. Do not post images larger than 400x300 pixels in the forum.
I am not sure if this would fit into the $10 range, but if not one of the trolls could be removed and you would still have a useable set... I guess I would call it Treasury Cart, or Supply Ambush, or something like that. What do you think?